SOLUTION: Need to find the cubic inch capacity of an object that is 2 inches in diameter and 18 feet long. What is the formula for solving this problem? It has been 40 years since I have h

Question 19673: Need to find the cubic inch capacity of an object that is 2 inches in diameter and 18 feet long. What is the formula for solving this problem? It has been 40 years since I have had to use this formula.
Thanks for your help.
Answer by wuwei96815(245) (Show Source): You can put this solution on YOUR website!
You need to find the surface area of the circle (at the end of the cylinder) and multiply it by the length of the cylinder.

area of a circle = pi times radius squared
a = 3.14 x (1")squared = 3.14" squared

volume = area x length
v = 3.14 x (18' x 12" per foot) = 3.14 x 216 = 678.24 cubic inches

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